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Connect-EJB method

  

Use the Connect-EJB method to invoke a connector to an external Enterprise JavaBean.

Parameters

This method operates on a named clipboard page that is the source and destination of data mappings. Make sure the Step Page column that calls this method contains the non-blank name of such a page.

This method has two parameters:

Parameter

Description
ServiceName

Enter the Service Name (second key part) of a Connect EJB rule (Rule-Connect-EJB rule type).
RunInParallel

Select if this connector is intended to run in parallel as a child requestor of the current requestor. If selected, use the Connect-Wait method later in the current or a follow-on activity to access results from the connector.

Results

The Connect-EJB method works as follows:

  1. Using rule resolution, the system locates the Connect EJB rule identified by the ServiceName parameter and the class of the step page or primary page.
  2. The system uses request information to call one of the EJB Create() methods or one of the Java class business methods.
  3. If the step page does not exist, creates a new page, of the class identified in the Pages & Classes tab.
  4. It checks whether simulation is in force for this rule. If so, calls the simulation stub activity.
  5. If simulation is not in force, calls the EJB method(s), in a separate requestor if the RunInParallel box is selected. (This temporary requestor has the same access group and clipboard as the original. At most 10 such child requestor sessions can be active at once.)
  6. Processes the response when it is received.

Checking the method status

This method updates the pxMethodStatus property. See How to test method results using a transition.

Caution: Design the activity to detect and handle exceptions. If the Connect-EJB method with the RunInParallel check box selected fails in a way that causes the Connect-Wait method to be skipped, the child requestor can be left hanging. If the limit of parallel requestors is then eventually reached, the parent requestor will fail as well. By default, the limit is 10 requestors in parallel; you can establish a higher or lower value in the prconfig.xml file or Dynamic System Settings using the services/maxRequestorChildren setting.

Related topics About Connect EJB rules
Connect-Wait method
Creating Connector Simulations

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